Contraptor is a do-it-yourself reusable construction set for hands-on learning, prototyping cartesian robots, digital fabrication and automation. Contraptor is Open Source Hardware with designs released under CC-BY-SA license.

Various сartesian robots can be quickly assembled from Contraptor and used as a prototyping platform for projects such as mini CNC machine, experimental or bootstrap 3D printer, hot wire cutter, plotter, laboratory robot etc.